Grate-bar



(No Model.) 4 Sheets-Sheet 2. G. L. KITSON 8u J. REAGAN.

GRATB BAR.

No. 391,052. Patented Oct. 16, 1888.

WITNESIES: gE/VTORS,

A TTORNE Y.

N. PETER; Phomnhogmpw, wnmngmn, n. c4

4 Sheets- Sheet 3.

G. L. KITSON 8v J. REAGAN.

(N0 Model.)

GRATB BAR.

ATTORNEY,

WTNESSES:

(No Model.)

4 Sheets-Shee'fJ 4|.

G. L. KITSON 8u J. REAGAN.

GRATB BAR.

Patented Out. 16, 1888.

INVENTOR/ {fer/7, of

WITNESSES WM,

WA TTORNEY,

@Nmap STATES Paranr @risica GEORGE L. KITSON AND JAMES REAGAN, OF PHILADELPHIA, PENNSYLVANIA GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 391,052, dated October 16, 1888.

Application filed January 2S, 188B. Serial Eo. 262,227. (No model.)

To all whom may concern:

Be it known that we, GEORGE L. KITsoN and J Anuns REAGAN, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grate-Bars, of which the following is a specification.

Our invention has relation to that class of fire-grates for locomotive or stationary boiler fire-boxes of the form comprising water-bars and tumbler-bars located parallel with the water-bars and secured to pivoted curved dogs or levers having operating mechanism whereby the tumbler-bars are raised in curvilinear lines to remove the ashes or burned material from the bottom of the fire without injuring or weakening it, and without necessitating opening of the fire-box doors; and it has for its object simplicity of construction of the parts of the fire-grate and the location or mounting upon fixed studs or shafts and upon rocker shaft or shafts of the curved dogs or levers for the tumbler-bars, whereby an economy in the cost of construction of the parts of the firegrate is effected, the latter is made more durable, its parts more readily attached to the fireboX and detached therefrom for repairs or other purposes, and the movable tumblerbars act to more effectually clean the fire, thereby making this form of fire-grate commercially available for use. Ourinvention accordingly consists of the combinations7 constructions, and arrangements of parts, having reference particularly to a fire-grate having water or other bars extending longitudinally from end to end of the grate, end and middle bearing` bars having studs or pintles for some of the tumbler-bar curved dogs or levers, and rocker shaft or shafts for the remaining tumbler-bar dogs or levers, which are connected together, so that a movement of the rock-shafts actuates the tumbler-bars, all as hereinafter pointed out in the specification and claims, reference being had to the accompanying drawings, wherein* Figure l represents a plan of a fire-grate detached from the fire-box, having two series of tumbler-bars attached to curved dogs or levers, some of which are supported or mounted upon fixed shafts and the remainder upon separate' rockershafts on said bearing-bars in accordance with our invention; Fig. 2, an end view of same drawn to an enlarged scale, and

showing the tumbler-bars and curved dogs or levers in their normal positions and in their raised positions; Figs. 3 and 4, longitudinal vertical sections showing the end and middle bearing-bars and the separate rocker or actuating shafts for two or more separate series of 6o tumbler-bar dogs or levers; Fig. 5, a partial longitudinal side elevation drawn to an enlarged scale, showing one of the water-bars, end bearingbar, curved dog or lever mounted on afixed shaft on said bar, tumbler-bar secured to said lever, and link-connection for the latter; and Fig. 6, a like view of the middie bearingbar supports for said parts.

A A represent the water or dead bars of a dre-grate, which may be connected to the fire- 7o box in the usual manner or otherwise, as desired, and as the firebox forms no part of our invention it is not shown in the drawings. At each end of the grate is shown a transverse bearing-bar, B, and at or near its middle is a single transverse bearing-bar, B', which bars may be of cast-iron, steel, or other suitable metal. rlhese bars B B have at their ends b, inline with their bottom b', longitudinallyprojecting plates or iianges b2, provided with open- 8o ings b3 for the passage of screws for fastening said bearing-bars to the bottom edges of the fire-box, so that they may readily be secured` in position and correspondingly removed for repairs or for other purposes. bars have in their top edges segmental or semicircular indentations b4 for the reception of the waterlbars A A, so that the latter not only have a bearing in the ends of the lire-box, but

are also supported upon the end bearing-bars, 9o

These bearing- Through the lugs roo In the openings c2 of lugs c of bars B B' are rmlysecured byscrews d studs orshort shafts d', so that the end bars, B, have on one 'side projecting studs or fixed shafts d', and the mid- 5 dle bar, B', has said studs or shafts projecting from both sides of the same, as shown. Upon studs d' are loosely mounted dogs orcurved levers D for some of the tumbler-bars of each series EE'. In the openings c2 of lugs c' of bars B B' are mounted rocker-shafts G and G', separate from one another, one for each series of tumbler-bars E and E', respectively, which rockershafts are preferably constructed and mounted as hereinafter described, and upon them are supported or mounted other but similar dogs or curved levers D for the remaining tumbler-bars. The dogs or levers D may 'support one or more tumbler-bars, as desired. rIhe tumbler-bars of each series have freeends, as shown, and are loeatedparallel with the water-bars A A below the line of the latter, as more plainly shown by full lines in Fig.,2.

The curved levers or dogs D at each end of .of the tumbler-bars are connected by links F, the ends f of which are formed to abut against the bottom of oneside of the fire-box when the tumbler-bars are in their normal position, as indicated in full lines, Fig. 2, to maintain the tumbler-bars in such normal position, the curvilinear movements of said bars being limited by their impingement against the water-bars, as shown by dotted lines, Fig. 2.

To admit of readily securing the studs or fixed shafts to the bars B and B', their vertical sides flare outwardly from above downwardly, and said bars are formed on their under sides with longitudinal grooves d2, as more plainly shown in Figs. 3 and 4.

The separate actuating rockershafts G G pass from end to end of the fire-grate and have bearings in all the bars B B'. rlhe rockershaft G for the front section or series of tumbler-bars,E,is made round in cross-section for corresponding bearings or openings", in the lugs c' con the middle and rear bars, B B', and square or angular in cross-section from the lug c' on the front end bar, B, to the opposing lug c' on the middle bar, B', the openings in the tumbler-bar dogs or curved levers mounted on said square part of shaftG being correspondingly made to tit such angular part and move therewith, so that a movement of shaft G rocks all the dogs or levers D and tumbler-rods composing the front section or series, E,without moving the rear section or series, E', as the round part of shaft G rotates or rocks in corresponding openings in the dogs or levers D mounted thereon for the series of tumbler-bars E. (See Fig. 4.)

To maintain the shaft G in position, or to prevent longitudinal movement of same, its square part is made larger in diameter than its round part, so that the ends of said square part abut against the opposing lugs c' on the front and middle bearing-bars,B B', as shown in Fig. 4. When this is done, the opening c2 through lug c' on the front bearing-bar, B, is

made large enough to admit of the passage through it of the enlarged or angular part of said shaft G. When the latter is inserted in place through the front end of the fire-box, a thimble, g, is inserted in said opening e2 and retained therein by a set-screw, d. The shaft G' for the rear series of tumbler-bars is correspondingly made, but has its angular part at its rear end, or between the opposing lugs c', on the middle bar, B', and rear bar, B. The round part of said shaft is at its forward end, and suitable thimbles,g, are inserted in the openings e? in the front and middle bearingbars, B B', and ralso in the openings in the curved levers or dogs between-said bearingbars, through which said shaft G' passes, as plainly indicated in Fig. 3.

Y Instead of making the angular part of shaft G' larger in diameter or in cross-section than that of its round part, said portions may be of the same size, as indicated by dotted lines x x, Fig. 3, in which case the thimbles g in bearingbars B B' and in said dogs or levers D are dispensed with, and when this is done an annular groove, y, may be formed near the front end of the bar or shaft G', within the opening c2 therefor in bar B, for engagement with a set-screw, d, to prevent longitudinal movement of shaft G'.

The forward ends of the rockershafts G G' projectout beyond the front of the fire-box, so that actuating-levers (not shown) can be se! cured thereto in the usual or any other suitable manner.

A firegrate constructed as above described, it will be noted, has but one central bearingbar for two separately-actuated series of tumbler-bars, which bearinghar, together with the end bars, B, has fixed studs or shafts for some of the tumbler-har dogs or leversD to IOO rock upon, and also has separaterocking shafts for each series of tumbler-bars, which rockershafts extend from end to end of the lire-grate and serve for bearings or supports for the remaining tumbler-bar dogs or levers D, and when actuated move the tumbler-bars of a series to clean the re. It will also be noted that the tumbler-bars and the rocking shafts are so connected to the end and middle bearing-bars, B B', and the latter so fastened to the fire-box that the bearing-bars B B' can readily be removed and the tumbler-bars and rocker-shafts dismounted for repairs or replacement. The use of the rocking shafts G G' for shaft or sup` port bearing for some of the tumbler-rod dogs D admits of dispensing with the usual slotted connections or links for said dogs. Further, the arrangement of the end and middle bearing-bars, B B', having the fixed shafts d and the rocker-shafts G and G' for supporting the dog D, maintains said parts in due alignment and enhances the durability and effectiveness of the working or movable parts of the regrate. Where only one series of tumbler-bars is used fora grate of a short'leugth, the middle bar, B', is dispensed with.

IIO

We do not herein limit ourselves to the de l tails of construction shown and described, as

it is obvious that they may be varied withoutl departing from the spirit of our invention; nor do we conline our improvements to waterbar Iire-grates, as it is evident that the same may be employed in connection with dead-bar ire-grates.

What we claim is- 1. In a fire-grate, the combination of stationary grate-bars A A, transverse bearingbars B B, located at or near the ends of bars A A, a central transverse bearing-bar, B', for bars A A, laterallyfprojecting xed studs or shafts on bars B B B', dogs or curved levers mounted on said studs or shafts, tumbler-bars secured to the upper ends of said dogs or curved levers, one or more rocker-shafts having bearings in bars BB B', otherlike dogs or curved levers mounted on said rocker-shaft, tumbler-bars secured to the dogs or levers on the rocker-shaft, and link-connection between the dogs or levers on said studs and the dogs or levers on the rocker-shaft, substantially as set forth.

2. In a'fire grate, the combination, with stationary bars A A, end and middle bearingbars, B, B, and B', laterally-projecting studs or shafts d' ou said bearing-bars, openings c" in said bars B, B,and B', rocker-shafts G G', having bearings in openings of, curved levers or v dogs looselyr mounted upon studs d', other curved dogs or levers mounted on said rockershafts, part of the dogs on the rockershaftsbeing loose thereon and the remainder secured thereto, so as to rock or move therewith, and link-connection between the dogs or levers on studs d', and the dogs or levers on the rockershafts. substantially as set forth.

3. In a grate having stationary and movable grate-bars, the bearing-bars B B', having i end iianges or plates, b2, openings c, and laterally-projccting fixed studs or shafts, combined with rock-shafts having bearings in openings 02, curved dogs or levers mounted on said fixed studs, other like dogs or levers on said rock-shafts, and linkeconnections for said dogs, substantially as set forth.

4. In a fire-grate, the combination of stationary water-bars, end and middle bearingbars, B, B, and B', rocker-shafts having bearings on said bars B B B', dogs or curved levers having bearings on bars B B B', other curved dogs or levers mounted on said rocker-shafts, tumbler-bars supported by said dogs orlevers, and linkconnection for the latter, Substantiall y as set forth.

5. In a fire-grate, the combination of stationarygrate-bars,curved leversor dogsloosely mounted upon the grate, rocker-shafts,curved dogs or levers mounted on said rocker-shafts, tumbler-bars secured to said dogsor levers, and link-connections for the latter, substantially as set forth.

6. A bearing-bar for re-grates having a longitudinal groove in its bottom surface, its sides diverging from its top to its bottom surfaces, side lugs, c c', studs or shaft projecting laterally from the lugs o', openings c2 in lugs c, and end auges, b, substantially as set forth.

7. In a grate, the combination of stationary bars A A, bearingbarsB B B', curved levers or dogs mounted or journaled on said bars B B B', rockershafts G G', each having an angular part in cross-section at one end, curved levers or dogs mounted ou said rocker-shafts, tumbler-bars secured to said dogs, and levers and link-connections for the latter, substantially as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

GEORGE L. KITSON. JAMES BEAGAN. Vitn esses:

S. J. VAN STAVOREN, CHAs. F. VAN HORN. 

